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arXiv 1908.06791cond-mat.mes-hall
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量子霍尔系统中无序对局域电子温度的影响

The Effect of Disorder on Local Electron Temperature in Quantum Hall Systems

N. Boz Yurdaşan, S. Erden Gülebaglan, A. Siddiki

摘要:

考虑在无序和均匀垂直磁场存在下的整数量子霍尔区的二维电子系统,计算了局域电子温度分布。我们解决热流体动力学方程,以获得在线性响应制度的局部电子温度的空间分布。结果表明,电子温度的变化与不可压缩带的位置有关,表现出关于样品中心的反对称性。为了了解样品迁移率对局部电子温度的影响,我们施加了一个屏蔽理论计算的无序势。在这里,长程势波动被假定为模拟累积的无序势依赖于杂质原子。我们观察到,局部电子温度强烈依赖于窄样品中的杂质的数量。

英文摘要:

The local electron temperature distribution is calculated considering a two dimensional electron system in the integer quantum Hall regime in presence of disorder and uniform perpendicular magnetic fields. We solve thermal-hydrodynamical equations to obtain the spatial distribution of the local electron temperature in the linear-response regime. It is observed that, the variations of electron temperature exhibit an antisymmetry regarding the center of the sample in accordance with the location of incompressible strips. To understand the effect of sample mobility on the local electron temperature we impose a disorder potential calculated within the screening theory. Here, long range potential fluctuations are assumed to simulate cumulative disorder potential depending on the impurity atoms. We observe that the local electron temperature strongly depends on the number of impurities in narrow samples.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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